Air chuck



FIG. 1 is a perspective view of the air chuck showing an attached handle and dual-head chuck;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevation view thereof; and,

FIG. 7 is a rear elevation view thereof.

All broken lines illustrate portions of the air chuck that form no part of the claimed design. 

CLAIM The ornamental design for an air chuck, as shown and described. 